62
Key
1 Boiler
2 Visible air break at plug hole – alternative connection can be below sink trap
3 75 mm sink, basin, bath or shower waste trap
4
5 Open end of condensate discharge pipe direct into gully 25 mm min below grating but
above water level; end cut at 45 °
Note – the maximum external condensate discharge length is 3 metres
6 Minimum internal diameter 19 mm
7 Pipe size transition
8 Minimum internal diameter 30 mm
9 Water/weather proof insulation
10 Fit drain cover/leaf guard
Figure 2(b) – Connection of a condensate discharge pipe upstream of a sink, basin, bath or
shower waste trap
Internal Condensate Pipe Discharge Termination
1
2
10
5
94
8
3
7
6
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